Update proto crates: protobuf to 2.8.2 and grpc-rust to 0.6.2 (#310)

All of the files within //proto/raze/remote are automatically generated
by cargo raze.

This updates the protobuf crate to 2.8.2, which is as far as we are able
to with the most recent version of grpc-rust, which is 0.6.2.  The
downstream dependencies of grpc-rust required specifying an upper bound
on the log 0.4 version, which would otherwise break log 0.3 dependent
crates.  This should be revisited if grpc-rust is changed or reevaluated
for a different default library.

This also introduces a patch folder, for patches to be applied by cargo
raze.  The rationale for patching protobuf is explained in the README,
but, in short, circumvents the build.rs file.

Author: dfreese

examples/proto/helloworld/greeter_client/greeter_client.rs

@@ -15,6 +15,7 @@
 extern crate grpc;
 extern crate helloworld_proto;
 
+use grpc::ClientStubExt;
 use std::env;
 use std::str::FromStr;
 

proto/raze/BUILD

@@ -3,53 +3,48 @@ cargo-raze workspace build file.
 
 DO NOT EDIT! Replaced on runs of cargo-raze
 """
-
 package(default_visibility = ["//visibility:public"])
 
 licenses([
-    "notice",  # See individual crates for specific licenses
+  "notice" # See individual crates for specific licenses
 ])
-
 alias(
     name = "grpc",
-    actual = "@raze__grpc__0_4_0//:grpc",
+    actual = "@raze__grpc__0_6_2//:grpc",
 )
-
 alias(
     name = "grpc_compiler",
-    actual = "@raze__grpc_compiler__0_4_0//:grpc_compiler",
+    actual = "@raze__grpc_compiler__0_6_2//:grpc_compiler",
 )
-
 alias(
     # Extra aliased target, from raze configuration
     # N.B.: The exact form of this is subject to change.
     name = "cargo_bin_protoc_gen_rust_grpc",
-    actual = "@raze__grpc_compiler__0_4_0//:cargo_bin_protoc_gen_rust_grpc",
+    actual = "@raze__grpc_compiler__0_6_2//:cargo_bin_protoc_gen_rust_grpc",
+)
+alias(
+    name = "log",
+    actual = "@raze__log__0_4_6//:log",
 )
-
 alias(
     name = "protobuf",
-    actual = "@raze__protobuf__1_6_0//:protobuf",
+    actual = "@raze__protobuf__2_8_2//:protobuf",
 )
-
 alias(
     name = "protobuf_codegen",
-    actual = "@raze__protobuf_codegen__1_6_0//:protobuf_codegen",
+    actual = "@raze__protobuf_codegen__2_8_2//:protobuf_codegen",
 )
-
 alias(
     # Extra aliased target, from raze configuration
     # N.B.: The exact form of this is subject to change.
     name = "cargo_bin_protoc_gen_rust",
-    actual = "@raze__protobuf_codegen__1_6_0//:cargo_bin_protoc_gen_rust",
+    actual = "@raze__protobuf_codegen__2_8_2//:cargo_bin_protoc_gen_rust",
 )
-
 alias(
     name = "tls_api",
-    actual = "@raze__tls_api__0_1_20//:tls_api",
+    actual = "@raze__tls_api__0_1_22//:tls_api",
 )
-
 alias(
     name = "tls_api_stub",
-    actual = "@raze__tls_api_stub__0_1_20//:tls_api_stub",
+    actual = "@raze__tls_api_stub__0_1_22//:tls_api_stub",
 )